I had symptoms for over 30 years before I got positive tests. Of course, I had never had anything like Visual Evoked Response, Visual Fields, or MRI before that dx time. I don't know if this was because they didn't have those tests before that? I don't remember when they invented MRI or VER. My parents suspected me of having MS when I got my first symptoms as a teen, but the doctor they sent me to found nothing. I think testing was primitive in those days. At least testing is not as primitive now. But we still don't have much in the way of cure. I am on the Swank diet, my best helper, ever since dx.